Fish-stop screen



Feb. 14, 1928. 1,658,875

s. L. ARNOLD FISH STOP SCREEN Filed Feb. 14, 1927 2 'Sheets$heet 1gwuanto'o 6AM UEL L EW/S Afi/VOLO Feb. 14, 1928. 1,658,875

5. L. ARNOLD FISH STOP SCREEN Filed Feb. 1927 4 2 Sheets-Sheet 2gwoemtom Patented Feb. 14, 1928'.

SAMUEL LEWISUARNOLD, or BOULDER, MONTANA.

FISH-STOP SCREEN: 7

Application filed February 14, 1927. Serial No. 168,198.

This invention relates to 'afish-stop screen foriuse] in irrigat onditches or canals.

Thisinjve tion" has for its primary object the provision, in ad'nann'eras hereinafter set forth, ofa fish stop-designed to be elniployedlinirrigation canals, which Will effectively stop the passage offi'slr'into the canals-and at the same time will not become clogged withleaves and other matter carried '10 hythc wat er into theirrigationditches.

Another ohj est-or; the invention is to proride, ina manner ashereinafter set forth, fish stop screen wh ch will'autoinaticallyregather against the face of the screen, sothatv the screenwill not inany Way interfere With the flow ofw ater through the canal to theditches. f

i A still further and finalobject of the in:

vention'is to provide, in'amanner as hereinafterset forth, ajfishstopscreen ior irr g'ation canals; whichiyill bestrong and duralole, elficieiitinaction; comparatively inex'- .ofthe canal. Gross coiinecting' rods8 extend pensive to manufacture and easily installed. Other objects andadvantages. of the invention will become apparent as the descripnon ofthe 'sainejp'i'oceeds; and the inyention will be best understood-frmn aconsideration of the following detailed description, taken in connectionwith the accompanying drawings, 'fOlflliiIllg ,apart-of thisspecification, with the understanding, however; that the in ventionisnot cohfiiid to any} strict con: forniity with the showing'of thedrawings butniay be changed orTi'nodifiedso; long as such changes (5r'iiiodifications niarkno ma-' I terial depar ture froin" the salientfeatures of i'n-ye' muss expressed in theappended clainisl I r' Iiiithedrawings:

Figure l show's the screen, structure enibodyiiig this invention,in'peispective, asset up injahanalj 4 Figurefl is a transversesectio'nal view 0i the-screen, the sectieiiheing taken longitudi na'llyor the canal" 9 i f Figure 3"isf'anenlarged detailed view ofa holdsthesaine in pdit'i'on'.

por'tidn of thescieen'and astop bar which guts 451s an enlar"ed'detailediew taken transversely of the r'ollerand stop bars show ingthe lnan'nernwhich the same'ope'rate to check the rey'ohi'tion"oi the screeii. I

Referring now "to thejfdrawingsin detail I wherein 'like numerals'off'ref nee' indicate views, the'nunierals 1 and 2 indicate the'sideandbottoinplanking respectively of a heady I MountedbetWeen the sidewalls 1, is a revoly'able shaft .3 from diametrically Opposite sides ofwhich there extendsthescreens indicated generally bythe numerals 4t. 4These screens areniade upjof a plurality of Wires 5 which extend throughthe shaft 3 extending" from theopposit'esides thereofin the manner shoivn'. These screens 4 "extend throughout the length of theshaft OrtheWidth of'the canal 1n which the device is placed Cross connecting bracerods 6 extend transversely' of the i spreading;

Extending at 'rightangles tothe screens 4 from" diametrically oppositepoints onthe shaft 3, are the spaced paddle rods 7 these rods beingpreferably extended through the shaft as shownin Figure2 to extend anequal distance upon eacliside-iyitli the flat faces thereof extendingtransversely of the length between the paddle'rods "'lfor inaintaininscreeirwires 5, to prevent Wires froin" 0" m the san e 1n the properspaced relat n,

- "Extending from point adjacent the out- '7' is-a brace Wire 8whicheonnectswith the outermost one ot'flth'e bracerods 6 oteach of; thescreens 4:; "Other brace Wires "extend from the paddle rods 7 inwardlyof the connecting; points :of thewircs' 9 tothe inner ones oi' thecrossfconnecting rods GOf each of the screens as indicated by Ithe 'n'u'3 v Q'V'erlying the canal and the revoluble the'roller ele1nehts12xifendinghetueeh the intermediate the ends thereof andeach'haylug oneend extended at an obtuse angle and formed in circular crossisectionasindicate d at 15,- each of theangledendsjof 'the side rails "beingturiied outwardly to setup hinge 'engagin'g fingers 16. "EacjhO'f thfingers "16' fisypiyotally *n 'ounted dint-"bearing -su-actm ii7 securedto the top'edge of an adjacent side plank lythus arranging the rails -11longitudinally ofe'ach side of: the canal.

The forward ends of rails 11 are coil being engaged lo one oi. theapertures i l of the, side rail,

These springs 19 tend to draw the screen retaining frame downwardly sothat the inner one of the roller members 12 will engage across the outeredge of one of the screens 4: to maintain the opposite or lower screenin position cross ways of the canal to prevent fish from passingtl'ierethrough.

During the passage 01 water through the canal, it will be of courseunderstood that considerable dbris will collect against the screen andwhen a sufiicient amount has collected, the pressure of the waterthereagainst "will; cause the screen to swing so that the upper screenwill ride beneath the roller engaging it and the entire structure willrevolve, allowing the accumulated matter to pass through thecanal. Thepaddle arms 7 will thus be brought down into the water of the canal andwill be actuated thereby to cause the screen structure to perform acomplete half revolution, the upwardly swinging screen 4tcontacting withthe outer-roller 12 which actsto breaker retard its movement. The forceof the impact between the free end of the swinging screen and the firstone of rollers 12 will cause the free end of the'frame llvto swingupwardly a siniicient distance to permit. the said upper spring to passbeneath this first roll-er. The frame 11 will be immediatelydrawndownwardly by the springs 19 bringing'the second one oi the rollers12 in the path of the free edge ot-the screen to stop the same, themomentum of the screen having been checked sutliciently by the impactwith the first one of the rollers to prevent it 'from again Forcing theframe upwardly and passing the second roller.

i Having thus described my invention, what I claim is:

1. In an irrigation canal fish screen structure, a revolnble shaftmounted transversely of the canal, diametrically oppositely, directedscreen structures mounted upon said shaft adapted to alternatelyposition in said canal, anddiametrically oppositelytdirected paddle armscarried by said shaft at right angles to said screen structure forcausing said shaft to describe a complete hall revolution under certainconditions.

2. In an irrigation canal fish screen strucot the canal in t 'lhe mannershown, the upper ends oi? the ture, a revoluble shalt mountedtransversely of the canal, diametrically oppositely directed screenstructures mounted upon said shaft adapted to alternately position insaid canal, and diametrically oppositely directed paddle arms carried bysaid shaft at right angles to said screen structure for causing saidshaft to describe a complete half revolution under certain conditions,and a screen relaii'iing element overlying said slia'lt'non mallyengaging the free edge of one screen to man'itain the otherscreeniiiposition in said canal. I I

3. in an irrigation canal fish screen struclure, a reroluble shaftmounted transverseh ot the" canal, diametrically oppositely directedscreen structures mounted upon said,

shaft adapted to alternately position in said canahand diametricallyoppositely directed paddle arms carried by said shaft at right angles tosaid screen structure for causing said shaft to describe a complete haltrevolution under certain conditions, and a screen retaining elementoverlying said shaft normally engaging the free edge of one screen tomaintain the other screen in position in saidcanal, said retainingelement having vertical swinging movement to permit release of thescreen held thereby upon the application of excessive pressure to thelower screen, to permit said screens to de scribe half revolution. I, V

l. A fish guard for irrigation canals, comprising a reel consisting of ashaft/and radi ally extending screenl frames carried thereby, said reelbeing designed to be pivotally supported between the side walls ofirrigation canals, and meansfor normally maintaining said reel inposition with one of said screens in position transversely of the canal,comprising a hinged frame designed to overlie the canal. and crossmembers carried by said frame one of which isnormally in con tact withone edge of a screen, substantially as and for the purpose described.

5. A fish guard for irrigation canals, confirprising a reel consistingof a shaft andradially extending screen :tramescarried thereby, saidreel beingdesigned to be pivotall y sup jiorhad between the side wallsof: irriga tion canals. and means for normally maim taininq said reel inposition with one of said screens in position transversely of the canal,comprising a hinged frame designed to overlie the canal, cross memberscarried by said frame one of whichis normally incontact withone edge ofa screen, and spring members connecting said frame at the treeend withthe fixed member to normallymaintain the frame in screen engagedposition. 7

6. In a fish guard for irrigation canals,'a reel comprising a shaftdesigned to be pivotally mounted transversely of acanal, screen memberscarried by and extending radially from said shaft, one thereof beingnormally positioned in and transversely of the canal, a reel restrainingframe comprising a pair of side members each having one end pivotallysecured to one side Wall of the canal and a pair of cross membersrotatably mounted. between and eoz'meetmg the free endsof said sidemembers, one of said cross members be ing designed to retard therevolving move ment of the reel and the other thereofbeing designed toengage a free edge of a screen to stop the revolution of the reel,substantially as and or the purpose described.

T. In a fish guard for irrigation canals, a

reel comprising a shaft designed to be pivotally mounted transversely ofa canal, screen members carried by and extending radially from saidshaft, one thereof being normally positioned in and transversely of thecanal,

a reel restraining frame eomprisinga pair of side members each havingone end p1votally secured to one side Wall of the canal, and a pair ofcross members rotatably mounted between andeonnecting the free ends ofsaid side members,j0ne of said'cross "members being designed to retardthe re volving movement of the reel and the other thereof being designedto engage a free edge of a screen to stop the revolutionof the reel,:means whereby said side rails are prevented from swinging below aposition wherein the last mentioned cross member will be below the freeedge of the uppermost one of said screens, and resilient means normallymaintaining said frame in down position.

Intestimony whereof I afiix my signature. SAMUEL LEVVIS- ARNOLD.

